Contact Us
Navajo Nation Environmental Protection Agency • Public Water Systems Supervision Program
PWSSP Staff
NAME
POSITION
PHONE
Yolanda Barney
Environmental Program Manager
871-7715
Merle Chischilly
Senior Environmental Specialist
871-7891
Elisa Arviso
Senior Hydrologist
871-7893
Delfred Gene
Civil Engineer
871-6789
Wendell Murphy
Civil Engineer
871-7758
Darren Begay
Civil Engineer
871-7766
Mark Toledo
Associate Civil Engineer
871-7709
Melissa Yazzie
Associate Civil Engineer - TEMP
871-7709
Lydell Yazzie
Associate Civil Engineer - TEMP
871-7709
Philbert Morgan
Environmental Specialist
871-7752
Dawn Begay
Environmental Specialist
871-7943
Michelle K. Silver
Environmental Specialist
871-7759
Valerie Tannie
Program & Projects Specialist
871-7757
Erwin Chaco
Environmental Technican - TEMP
871-7709
Philbert Yazzie
Senior Office Specialist
871-7755
Shileen Livingston
Office Specialist
871-7600
Rhonda Notah
Office Specialist
871-7753
Our office is located in the Old Museum Building on the Navajo Nation Fairgrounds between the Dean C.
Jackson Arena and Gorman Hall, on State Route 264 in Window Rock, Arizona.
Contact
Information
Shipping Address

HWY 264, Navajo Nation
Fairgrounds
Old Museum Bldg (Bldg #
W008-042)
Window Rock, AZ 86515
Mailing Address

Post Office Box 339
Window Rock, AZ 86515
**NEW**

How can we improve our service?
We welcome and value your comments and suggestions about our service to the Navajo Nation for
which we are here to ensure the safety of your drinking water with diligence and respect to all of our
clientele and the community. Your views help us understand the needs and shortfalls of our program so
that we may improve our services to you.

If you have comments or suggestions, or think we could improve any aspect of our service, please let us
know. It is also good to know when you think we have done something well or you were impressed by
the service we provided.

Privacy statement
NNEPA-PWSSP respects your right to privacy and we value the trust you place in us to handle your
information, whether it be confidential or sensitive. The information you have provided will be used for
the purpose for which you have provided. Note that compliments will be passed on to our staff
member(s) and our Program Manager.
Questions, comments, or feedback:
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